Luthiers Mercantile International
Supplier of woods, specialist tools, equipment and instrument hardware, books and plans for luthiers. Online shopping and contact details for their store. [California, US]
http://www.lmii.com/

Stewart-MacDonald
A source for repair technicians, builders, and musicians; offers parts, hardware, accessories, tools, plans and kits. [Ohio, US]
http://www.stewmac.com/

International Luthiers Supply, Inc.
Stringed instrument making and repair supplies, including tonewoods, tools, parts, kits; offer a catalog in PDF format. [Oklahama, US]
http://www.internationalluthiers.com/

Allied Lutherie Ltd.
Supplier of woods, equipment, tools and accessories for guitar builders; company profile, product details, online shopping and details of their store. [California, US]
http://www.alliedlutherie.com/

Madinter Trade
Online store for wood, parts, fittings, and tools for guitar building; also offer plans and kits. [nr Madrid, Spain]
http://madinter.com/

Australian Luthiers Supplies
Online store selling tonewoods, tools, parts, and inlays for building guitars and mandolins. [Queensland, Australia]
http://www.luthierssupplies.com.au/

WD Music Products
Retailing parts for acoustic, electric and bass guitars; also sell kits. Includes company information, terms and conditions, and catalog. [Florida, US]
http://www.wdmusic.com/

Exotic Woods
Supplying specialty woods to major manufacturers of stringed instruments, woodwind instruments, pool cues, and custom cabinetry; also supply hardware for stringed instruments. Includes product details and ordering instructions. [New Jersey, US]
http://www.exoticwoods.com/